ISAR False Target Array Generated by Sub-Nyquist Sampling Jamming in Fast and Slow Time

摘要

Sub-Nyquist sampling is a common means of interfering with inverse synthetic aperture radar (ISAR) imaging, which has been validated for the feasibility of sub-Nyquist sampling jamming against ISAR imaging in down range domain. In order to generate more false target images, taking sub-Nyquit sampling in both domains to get false target image array is proposed in this framework. The jamming signals, which are formed by the intercepted radar signals under the sub-Nyquist sampling theorem and scattered by moving targets, are collected by ISAR to obtain final images show that the deceptive false-target images retaining the real target information will be induced. Simulated trails and real data of a Yak-42 plane are used to validate the correctness of the analyses and the finally well-focused false-target images greatly support the effectiveness of the sub-Nyquist sampling idea in the countermeasures of ISAR.